harden calculation contracts and local API boundaries

tests/test_three_engine_parity_runner.py

@@ -0,0 +1,26 @@
+from __future__ import annotations
+
+import sys
+from pathlib import Path
+
+
+ROOT = Path(__file__).resolve().parents[1]
+SCRIPTS = ROOT / "scripts"
+if str(SCRIPTS) not in sys.path:
+    sys.path.insert(0, str(SCRIPTS))
+
+from three_engine_parity_runner import build_public_case_replay  # noqa: E402
+
+
+def test_public_same_chart_replay_never_promotes_missing_vedastro_raw(tmp_path: Path) -> None:
+    report = build_public_case_replay(output_dir=tmp_path, allow_vedastro_network=False)
+
+    assert report["case_id"] == "steve_jobs_public_1955_lahiri"
+    assert report["birth_data_policy"] == "public_case_only"
+    assert report["engines"]["PyJHora_JHora"]["status"] == "raw_imported"
+    assert report["engines"]["jyotishganit"]["status"] == "raw_captured"
+    assert report["engines"]["VedAstro"]["status"] == "blocked"
+    assert report["status"] in {"partial", "blocked"}
+    assert report["tested"] is False
+    assert report["comparison_rows"]
+    assert all(row["status"] in {"blocked", "not_comparable"} for row in report["comparison_rows"])